A fibm compose



F. H. UPPINCOTT.

l CABLE CLAMP.

APPLICATION FILED oec. 13.1918.

Patented Oct. 14, 1919.

M7/mss.- @7734/50 FISHER', Ir. inirrmcorjr; or rHrLADELr'H-in, rijnisYLvAivrA, nssrGNoarc-AL' HAND krlo GOTT, a citizen of -thevUnited States',l residing'-atPhiladelphia,county of Philadelphia, 'and State of Pennsylvania,.fhavelinvented c n Ledges ofthe twoshell sections are also proa new and useful Improvementyin; Cable- Clamps,Y ofswhichthe Yfollowingfis a full, clear; and :exact description, reference 'l beingfh'adhto the accon'ipanying drawmgs, which form 'a' part 'of thisfspecifcationz:

The object of my invention `is to :provide cable, wire, "or other analogous devices upon which,fin use, tension isfimposed.v VSpecifically, the Objectis to 4provide fa device which'- may Vbe manufactured `economically and'withoutthe necessity ot employingeX- pensive special -to'ols or-:dies or of exercising overcare inthe process of manufacture, which may be readily assembled, which wl'lll Lresist 'maximum pulling .strains to which the cables would be subjectedvin practical use, and whose clamping function? will not be impaired by contraction Zand expanslon due to atmospheric temperature variations. y

"-'A'preferred embodiment ofthe invention i is shown Fin the drawings," in which-f fori une a e or rig. 2.;

jlfFigure 1 is alsideelevationfof the clamp in clamping relation 4with the two .1 sections fri-g. e vis a Simnarew with th lamp in Vsection.

Fig. 3i`s a cross-'section through the clamp VFiggfl is* a detail perspective 'View of the two retainingwedges.y v f l" Fig., 5 vis ,la detail perspectiveviewr ofy the The clamp comprises "a Vreinforcedflshell adaptedv to receive the cablesections to be clamped, longitudinally relatively slidable y 'wedge members adapted,y to be interposed betweenthe cable sections within vthe jshelh'. and akey adapted kto lock the wedge'mem" bers in'their fasteningrelation.

c v The shell, in its completed condition, a unitary member of flattened tubular form siiqincafunlof atteignent l `jection projecting yeachedgeand litftingazcomplementary :recess I in 4the abutting 4edge-.of the other shell section;` This avoids the dangerofseparation of;j the-shell .secl tions under longitudinal strain. Abutting yvided with registeringfrecesses, forming Va 'circular orifice al forrithe .reception-ofi the loelring key, as. will A be hereinafterv eX- plainedmEach-.shell isectionLis. provided with'a longitudinally extending taperedvex- :tensioni-e which flares outwardly from the axis ofthe shell. l-The'extensions e of the .twosections extend in 'respectively opposite directions. c. Y. Y Y rFor certain luses, as',ifor instance, where the clamp is employed to fastenlfa free end of a cable to asection of cable Vbetween its ends, only one'shellj lsection need beprovided: with anextension. i These outwardly flared wings or extensions are yof importance in that the strong pulling-action upon the cable sectionsltends tov tilt the clamp atan preferably :spirally grooved, to" correspond ywith ythe ilspirally ridged cable section' to f be seated .thereinp' f f ang-le tothe longitudinal ydirection, yof'eX- A soKV Y .The'two cable sections, to be clamped 'Y together are inserted into.` opposite sides of the shell andarepositionedftogethery by means yofV two wedge-shaped retainers f, f,

which are introducedV into*l the shell from op- -posite endslthereofandinterposed between the two cable sections@ By pushingorvtap'- rpingithe. two retainers in ,oppositerdireetions, they will, `by reason of their wedge contour, be forced laterallyagainst theca'ble y i sections and confine them in their seats Vwithin the shell. The wall of each retainer which engages the cable section is of con-v cave form 'and Ycorrugated or otherwise grip upon the cable section. n

roughened to ,enable Vit to .secure an adequate After the cable sections are thus fastenec ldriven laterally between the wedgesV and through the orilice on the other side of the shell, the projecting end being then bent down against they outer wall of the shell. By this means, the retaining wedges are forced laterally with considerable force', so as to conline the cable sections very tightly against their seats within the shell.

l Comparative tests demonstrate that a lclamp constructed inl accordance with my invention has a pronouncedly superior clamping force. Although it is known to make cable clamps .of fewer parts, the elements of my improved clamp can be .made very cheaply, and no nice accuracy of manufacture is required. The preliminary application of the retaining wedges does not require a powerful, or any, driving action; and theV final tightening or locking action is effected by driving the key into place,

during which `operation there -is no substantial relative longitudinal movement of the .associated parts. If expansionandcontraction, due to changes of temperature, yafects the grip of the clamp, the power of the cable willtighten the grip and preventthe cable from slipping. lVith my clamp, if the pulling strain becomes sufficient to start slipping of the wedges, the slipping is immediately checked byltheir automatic adjustment.

Having now. fully described my invention, what I claim and desire to protect by Letters Patent is: i

1. A clamp for locking together cable sections-or the like, comprising an exterior shell, interior Yretainers adapted to position the cables within the shell, and a keyadapted to Yengage the Iretainers and securely lock the cables inthe shell. du v2 HA clamp `forlocki'ng together-'cable sections -or the like, comprising an eXterior shell providing oppositely located'seats vfor the respective cables, a pair of wedge-shaped retainers adapted to be positionedibetween the cables to force .them laterally yagainst their respective seats, and a key .adapted to be drivenbetweenthe retainers. 1

3. A clamp for locking together cable sections or the like, comprising a shell providing seats, for the respective cables, maintained in .Xed relation with each other, a pair ofwedge-shaped retainers adapted to Copies ofy this patent niay be obtained for be positioned between the cables l and, by longitudinal movement in opposite directions relatively to each other and to the shell, be displaced laterally to confine the cables within their respective seats, and a Ikey adapted to be driven laterally between site -ends of .the shell with longitudinallyl `extending tapered extensions'fiar'ed outward `towardtheir extremities, and means to sev.cure tivo cable. sections within the shell respectively alongA said opposite sides thereof.

6. A clamp/iioilocking together cable sections or the like, comprising a shell made of two sections, .a projection along one ofthe abutting ,edges of one shell section engaging a recess in theadjacent abutting edge ot the other shell section, and a pair of reinforcing rings each surrounding both shell sections, whereby the kshell sections are heldy ifrom relative longitudinal displacenient .and lateral distortion, each shell section being provided along `its longitudinal` central zone with a seat for va cable, one orvbothofthe Ytwo shell ,sections provided fwith a. longitudinally-extending tavpered Aoutwardly laredeXtension, a pair of wedges adapted to be inserted Vwithin the shellzbetween the cables .andto slide longitudinally one upon the other and thereby ydisplaceithe cable sectionslaterally against their seats, and a key adapted to be driven laterally between `the wedges and through orifices in opposite walls of the shell.

A'In testimony of which invention, I have hereunto set my hand, at Philadelphia, Pa., onthis 9th day of December, 1918.

msi-1ER H Lrrrincorr.

vebcents eachluby addressing the Commissioner of Patents, Washingtomp. G. 

